CN85107254A - The processing method of preparation ozone - Google Patents

Abstract

In ozonizer, produce ozone and in the transformation adsorber, ozone is separated with unconverted oxygen.From the transformation adsorber effusive ozone with flow through an equalizer tank before flow media mixes, this equalizer tank has loaded silica gel at least in part.

Description

The processing method of preparation ozone

Involved in the present invention is the preparation technology method of a kind of material processing with ozone.By this processing method, ozone is made raw material with oxygen and is produced in ozonizer.

Ozone is the good oxygenant of multiple organic compound and mineral compound.For example, people can come useless composition in the treating water with it, make water decolorization or detoxifcation, perhaps make the useless composition in the water be easy to biological degradation or flocculation.The oxygenizement of ozone can be used in the chemical field, for example is used for relieving haperacidity; Utilize the ozone can bleached pulp; Utilizing ozone to handle plastics can make the frosting performance be improved.A lot of gases also can be had an effect with ozone, and for example nitric oxide can be by the oxidation of ozone institute.

In industrial operation, ozone is made raw material mat static discharge method in ozonizer with air or pure oxygen and is prepared.Because only some is converted to ozone to infeed oxygen in the ozonizer, so must from ozone, separate unconverted oxygen, and, for the purpose of saving, unconverted oxygen is recycled in the ozonizer goes using pure oxygen to produce under the situation of ozone.Oxygen can carry out in a kind of transformation adsorber with separating of ozone.In adsorption process, pressure boost slightly, the silica gel that ozone is in the adsorber is adsorbed.In desorption process, slightly reduce pressure, ozone is promptly by desorption.Desorption can utilize certain cleaning gas to carry out; But use the shortcoming of this gas to be, diluted for it by the ozone of desorption.

By DE-OS3230922, knownly a kind ofly be lower than the processing method of carrying out desorption under the condition of barometric point.Wherein, for instance, vacuum is to use a kind of pneumatic plant of spraying water to produce.The ozone that flows out from the transformation adsorber is not diluted, and it mixes with the water of water spray pneumatic plant.If necessary, even in this water, the reaction that ozone also can be scheduled to.

In view of the practical application of processing method described in the DE-OS3230922, in the gas of desorption process institute desorption, the concentration of ozone is inconstant.When desorption process begins, high concentration peak occurs, and in desorption process, the concentration of ozone descends constantly then.In addition, in the initial stage of desorption process, the pressure in the desorption pipe also obviously raises, particularly when using rough vacuum, during little desorption pipe volume.

The fluctuation of concentration is owing to the bearing capacity of silica gel in desorption process to ozone reduces to cause.Owing to also have residual oxygen in the gas that is adsorbed, so the concentration of ozone also is subjected to the influence that has been attracted to the residual oxygen in the silica gel in the adsorption process and has been attracted to the residual oxygen in silica gel absorber free volume and the pore volume.Variation on this concentration and the variation on the pressure do not influence application in many aspects.Yet in the time of reaction times and retention time weak point, these variation meetings have a negative impact to predetermined reaction.

Therefore, the objective of the invention is to improve the known processes among the DE-OS3230922, make under constant pressure and constant concentration, to be passed in the vacuum generating device and go at the ozone that is lower than desorption under the atmospheric pressure conditions.

Processing method of the present invention, its advantage are that pressure peak that is produced and peak concentration can be by compensation and balanced in by the gas of desorption.Pressure and concentration can be hanged down expense and be remained on below the danger limit value.With the exception of this, all permanent interactional reactant of ozone concn keeps the short time in the reaction that has ozone to participate in.Newly observed ultimate value, pressure are that 0.6 crust (absolute pressure), concentration are every cubic metre of process gas 160 grams.

Unique description of drawings one embodiment of the present of invention, wherein the used pressure below atmospheric pressure of desorption ozone produces with the water spray pneumatic plant.

Produce the used oxygen of ozone and take from vertical tank 1 with liquid state, evaporated in vaporizer 2, its pressure is reduced to 0.5～2 crust (absolute pressure) inpressure reducer 3, be passed to then in the ozonizer 4.Ozone-oxygen the mixture that produces in the ozonizer 4 is transported in the transformation adsorber 6 with recycle blower 5.Transformation adsorber 6 is made up of two containers that are filled with silica gel at least.These two containers were with 0.5～5 minute timed interval alternate operation.Be adsorbed in the ozone container therein, oxygen then flows through this container and is gone viapipeline 7 defeated getting back in the ozonizer by the state that had not polluted with cleaning.

Simultaneously, ozone is being lower than in another container under the condition of barometric point by desorption.Vacuum produces with water spray pneumatic plant 8.It produces a kind of vacuum that is lower than 0.2 crust (absolute pressure) in the suction side of leading to transformation adsorber 6.Injection water plays a part flow media, and its pressure makes water spray pneumatic plant 8 reach required suction capactity owing to the effect ofpump 9 is increased, and flow direction is as shown inarrow 10.

Effusive desorption gas is made up of ozone and residual oxygen from transformation adsorber 6.It with water spray pneumatic plant 8 in mix as the water of flow media before, theequalizer tank 11 of under vacuum condition, flowing through.The capacity of thisequalizer tank 11 is three times of arbitrary vessel content in the transformation adsorber 6, and wherein 1/3rd volume is filled with silica gel 12.The filling position of silica gel 12 is at the exit end ofequalizer tank 11.

Equalizer tank 11 makes that elevated pressure lowers when desorption process begins, and makes the ozone concn in the desorption gas be able to equilibrium before ozone is introduced in the reaction medium.The ozone that is produced in the ozonizer 4 is owing to and oxygen adsorbed and complete basically by the silica gel in the transformation adsorber are separated.Then, utilize vacuum that the ozone desorption is come out.The 3rd rapid step by step in, ozone is adsorbed and be stored for the silica gel in theequalizer tank 11 12 again.At last, in the 4th step, promptly in last step, ozone balancedly has been discharged in the flow media of delivery medium or reaction medium effect and has been gone.

Certainly, processing method of the present invention has more than and is confined to use the water spray pneumatic plant to produce vacuum.For example, vacuum also can produce with a kind of injector and a kind of gaseous media that is used as flow media.Vacuum also can produce with pump, and flow media only is used as the delivery medium of ozone.

The capacity of equalizer tank depends primarily on the swabbing pressure that is applied.Its capacity is generally two times to four times of arbitrary container in the transformation adsorber 6.Equalizer tank 11 also can load the silica gel more than 1/3rd.In general, when the concentration that should manage to prevent to be surpassed 0.6 crust (absolute pressure) by the pressure peak of desorption gas and prevent ozone is in desorption process and begins with every cubic metre, also promptly when absorption is converted to desorption, and the free volume of single container internalcause equalizer tank 11 and the volume of silica gel 12 integrate the swabbing pressure that is applied in the transformation adsorber 6, this pressure is generally less than 0.2 crust (absolute pressure), due in the decompression process gas of state of the art surpass 160 gram ozone for the benchmark meter.If be no more than these ultimate values, ozone is released afterequalizer tank 11 equalized pressures with highly all permanent concentration.

Make raw material with oxygen and in general ozonizer 4, produce ozone, and the method with adsorbents adsorb ozone is separated ozone and unconverted oxygen in a kind of transformation adsorber 6.Desorption can use certain cleaning gas, perhaps uses vacuum to carry out.The advantage of vacuum method is that ozone does not mix with cleaning gas, and gives birth to reaction with pure state and flow media hybrid concurrency.Yet, in the desorption process under the vacuum condition pressure peak and peak concentration can appear, particularly at desorption process at first.This does not wish to take place for carry out crucial material processing with equal permanent mode ozone supply for.

In order to eliminate this pressure peak and peak concentration, among the present invention ozone is flow through anequalizer tank 11 under vacuum; This equalizer tank is placed between transformation adsorber and the vacuum generating device, and has wherein loaded silica gel 12 at least in part.

Claims (6)

1, a kind of material processing production method of ozone, wherein be that raw material produces ozone in ozonizer with oxygen, in room temperature decompression adsorption process, in the transformation adsorber, make ozone that is generated and the oxygen of failing to transform disconnected from each other and with unconverted oxygen defeated get back to reclaim again in the ozonizer use, after this acting in conjunction with vacuum generator and flow media in the desorption process of adsorbed ozone under being lower than atmospheric pressure conditions is flowed out from the transformation adsorber, mix and be used for material processing with flow media, it is improved one's methods and is, ozone is with before flow media mixes, and effusive flow of ozone is crossed an equalizer tank that loads silica gel at least in part from the transformation adsorber.

According to claim 1 described method, it is characterized in that 2, the equalizer tank volume is two times to four times of any contactor in the transformation adsorber.

3, according to claim 2 described methods, it is characterized in that having at least 1/3rd to load silica gel in the volume of equalizer tank.

4, according to claim 3 described methods, it is characterized in that silica gel is placed in the outlet side of equalizer tank.

5, according to claim 3 described methods, it is characterized in that the volume of equalizer tank has at least 1/3rd to load silica gel.

6, according to claim 4 described methods, it is characterized in that silica gel is placed in the outlet side of equalizer tank.

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